Combined hot-air and steam heater



(N6 Model.)

i w. H. DBNSLOW. Y COMBINED HOT AIR AND STEAM HEATER.

No. 361,350. PatenpedApr. 19,1887.

witnesses N. PEYERS4 Phamuumgmpher, wnmnlwn. DAC.

Ill

' UNITED STATES PATENT OFFICE.

VILLIAM HURBURT'DENSL-V, OF ULSTER, PENNSYLVANIA.

COMBINED HOT-AIR AND STEAM HEATER.

SFECIFICATION forming part of Letters Patent No. 361,350, dated April 19,1887.

(No model.)

Toy @ZZ whom, it may concern:

Be it known that I, WILLIAM HURBURT DENSLOW, acitizen of the United States, residing at Ulster, in the county of Bradford and State of Pennsylvania, haveinventedanew and useful Improvement in Combined Steam and Hot-Air Heaters, of which the following is a specification, reference being had to the accompanying drawing.

My invention relates to an improvement in combined steam and hot-ai r heaters;- and it consists of the peculiar construction and combination of parts, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawing the single figure is a vertical sectional view of a heater embodying my improvement.

A represents an outside casing, which may be of any preferred shape. In this casing is located a heater, B, which consists of the cas-V ing O, ash-chamber D, combustion-chamber E, grate F, and steam-boiler G, which is'located on top of the combustion-chamber. The sides of the casing C are some distance from the sides of the combustion chamber and boiler, so as to leave a space for the circulation of hot air. The ash-chamber extends en tirely across the lower end of the casing C, andhas a top plate, H, which divides it from the air space between the sides of vthe combustion-chamber and boiler and the casing C.

The lcasing C is made of vany suitable metal, and is covered with asbestus or other non-couducting material, (not shown,) so as not toV -casing A, having dampers i', communicates with an opening in the ash-chamber, and a door, K, in the casing A, communicates with the combustion chamber. Vertical ilues g pass through the boiler and lead to a smokepipe, M.

, a represents a water-reservoir,which is su pplied from any suitable source by a pipe, b, in which is located a stopcock, c. The bottom provided for the pipe (l, and a watc1-gage,f, is provided for the reservoir.`

S represents a pipe that leads from the top of the reservoir to the top of the boiler. This pipe has a'stop-coek, t.

' g represents hot-air pipes, which extend from the casing C to registers h, which are located at any desired point in the building in which the heater is placed. Each of the registers is provided with a casing, i, with which the hot-air pipes communicate, and in the said casing are located steamheat radiators,which are preferably formed of cylindrical vessels open at their upper end and nested the one Ywithin the other, whereby a space, k, is left thereof, to convey the steam and water of condensation back from the steam-radiators to the boiler.

In the central flue or smoke pipe, M, of the boiler, below the point where the lues g communicate therewith, is located a damper, o, which may be operated by means of a rod, p.

`When a sufcient quantity of steam is generated, this damper may be closed, sending the smoke or heat up against and into the central flue and passing through the outer dues above the damper into the main smoke-pipe, thus making a distinct and independent draft through the boiler.

Before raising the steam in the boiler the latter is filled with water to the proper level, by opening the stopcocks and e and allow ing the water to passfrom "the reservoir into the boiler. The stop-cock c is then closed and the cock t opened. Vhenthe water descends below the proper level, steam nds its way through the pipe S into the upper end of the reservoir, and its pressure on the water therein IOC) forces water from the water-reservoir into the boiler, by which means the boiler is fed automatically and the p roper quantity of water always maintained therein. By locating the steam-pipes in the hot-air pipes loss of steam is prevented by condensation, owing to radiation of heat.

Having thus described my invention, I claim- 1. The combination, with the combustionchamber E, of the stcanrboiler located above the same and having the saine diameter, the central iiue or smoke pipe, M, in the boiler, the ilnes y around the central Hue, all of said lues communicating at their lower open ends with the combustionchamber, the ilucs y having their upper ends opening into the ccntral Iiue outside the boiler, and thc damper o, located in the pipe M, below the point where the iiues enter the said pipe, as set forth.

2. The combination oi" the boiler and heater with the casings 11i, having the registers 71., the steam-radiators located in the easings i, but not communicating therewith, the said radiators comprising the inner and outer vessels forming the confined spaces k between them, the pipes leading from the heater to the casings i to convey hot-air thereto to bc discharged through thc registers, and the steampipes extending from the boiler to the radiators and returning from the same, the said pipes communicating with the spaces 7c in the radiators, but not with the casings ,whereby the steam in the radiators does not mingle with the hot-air in the casings t', substantially as described.

3. rIhe combination of the hot-air casing z', having the register h on one side, and the pipe to supplyhot-air tothe casing,with the steamradiator located in the casing and having the central recess open on the side presented to the register, the said radiator comprising thc inner and outer vessels or walls, forming the space L between them, which space does not communicate with the interior of the casing, and the steam-pipes communicating with the radiator to circulate steam through the same, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

ll'llililMl lllililit'lt'l' llllNSlil'lll'.

\Vitnesses:

GHiis. C. MILLER, F. E. Cocswnm.. 

